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Performance requirements

Performance requirements. High-Level Key Performance Parameters (KPP)

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Performance requirements

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  1. Performance requirements High-Level Key Performance Parameters (KPP) • The high-level KPPs cannot be directly measured without beam. The capability to achieve these parameters can be demonstrated at CD-4 through the measurement of the low-level KPPs plus simulation studies using the full STAR detector simulation package and analysis software. DOE HFT Review

  2. Low-level CD-4 KPPs Experimentally demonstrated before installation: The achievement of the low-level KPPs will be proven through bench tests, survey measurements and the meeting of design specifications (Appendix A of PEP) Will be addressed in sub-system talks Parameters can be demonstrated and documented before final assembly and installation of HFT in the STAR detector. DOE HFT Review

  3. Pointing resolution • I used the rectrees made by Yifei. • It used minimc files ,so it has the matching GEANT and reco • Therefore there is the particle Id so that I have plotted the dcaXY (r-phi) for kaon, pion, proton with perfect PID • Run over the 10k for both THIN and THICK (the rectrees were already done) • Cuts : RcHitsPxl == 2, RcNHits >15 • There is a root file with the raw histograms (both TH2D and fitSlices() for kaon, pion, proton, THIN and THICK at : /star/institutions/ksu/bouchet/THICK_HFT/ANA_RECTREE/RETEST/comparison_thick_thin_cd1.root

  4. THIN 750 Kaon CD4

  5. THICK 750 Kaon CD4

  6. THIN

  7. THICK

  8. THIN

  9. THICK

  10. These plots are for DEMO purposes of course • Once we have the final system in place with ACTUAL thickness and ACTUAL dead areas etc known, the simulations need to be repeated in order to extract the final numbers and THEN see if comply with CD4

  11. BACKUP

  12. Thin-thick DCA • Files used : • Rectree: • /star/u/yfzhang/lbl/hft/upgr15/cd1/production/thin/particle/ntuple/out/ • 20 D0, 30 Ds /evt with power-law pt, 30 Lc /evt with flat pt (fz) + Hijing AuAu Central fz • DCA XY and Z reconstructed using StPhysicalHelixD • Reconstructed DCA of particles (K,pi,P) are matched with their geant_id = “perfect id” • Cuts : Pixel hits requirement =2 ; TPC hits reco. > 15 CD2/3 DCA : thin/thick

  13. Pointing resolution in r/phi CD2/3 DCA : thin/thick

  14. Pointing resolution in Z CD2/3 DCA : thin/thick

  15. note • We reached an agreement btw data and hand calculations of Jim Thomas when the “log” term wasn’t used in the MCS definition CD2/3 DCA : thin/thick

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